期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 6, 期 16, 页码 7014-7020出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta01539b
关键词
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资金
- Ningbo Science and Technology Bureau [2017C110034, 2014B81004]
- National Key R&D Program of China [2017YFB0309600]
- Youth Innovation Promotion Association of Chinese Academy of Science [2014258]
- National Nature Science Foundation of China [51703233, 5161101025]
To achieve highly efficient purification of emulsified oil, a superhydrophobic, superoleophilic and under-oil superhydrophobic poly(vinylidene fluoride) (PVDF) nanofibrous membrane was developed through a facile electrospinning strategy. The PVDF nanofibrous membrane exhibited a synchronous combination of nanofibers and micro/nanospheres, which was produced by solely controlling the PVDF concentration of the electrospun solutions. The fabricated PVDF nanofibrous membrane exhibited a water contact angle of 152 degrees +/- 2 degrees, oil contact angle of 0 degrees in air and under-oil-water contact angle of 152 degrees +/- 1 degrees due to the inherently low surface energy and unique structures composed of nanofibers and micro/nanospheres. Thanks to the under-oil superhydrophobicity, hierarchical structure and high porosity (similar to 95%), the composite membrane showed extremely high permeability of 88166 +/- 652 L m(-2) h(-1) bar(-1) with separation efficiency higher than 99%, which was few orders of magnitude higher than the previous findings. Moreover, the nanofibrous membrane exhibited robust continuous separation, indicating its scalable application for purifying emulsified oil.
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